.mushroom-gallery-image{
  width:100%;
  height:100%;
}
.page--mushroom-gallery_wrapper{
  display: flex;
    flex-wrap: wrap;
}
.page--mushroom-gallery_item{
  width:calc(100%/2);
}
@media screen and (min-width:768px){
.page--mushroom-gallery_item{
  width:calc(100%/3);
}
}